tugs Apex, Phenix, Velox and Tenax. Solent Towage, a subsidiary of Østensjø Rederi, operates the four escort and anchor handling tugs, which were all delivered within the last two to three years.
Operations Apex, Tenax, Velox and Phenix all have similar dimensions at 37m loa, a beam of 14m and an operational draught of 6.70m. Tenax, Apex, Phenix and Velox
have a maximum speed of 15kts at 19m3
economy speed at 12m3
fuel consumption, and 12kts . The
vessels are furthermore equipped with Voith turbo fins for extended manoeuvrability and are equipped with oil recovery, fire-fighting equipment (FiFi1) and also for salvage in open waters. The towing equipment onboard
includes double drum hydraulic type Karm winches with a pull force of 200t and a break force of 300t. All four tugs were built at Astilleros
Gondan in Spain and carry the notation Det Norske Veritas +1A1 Tug EO OilRec Fi-Fi I Escort (150/10) ISM ISPS. The most recent of the newbuilds is
Apex, which was delivered to Solent Towage earlier in 2008.
Generation Powered by two Rolls Royce Bergen type C25 engines (33L8P) the tugs’ engines have a total cont inuous output of 5040kW, 6850bhp. Sister vessel Velox has a slightly lower horse power rating at 6530bhp.
TECHNICAL PARTICULARS Vivax
Length, oa .........................................33.10m Breadth, oa .......................................12.00m Depth, mld ..........................................5.36m (not including skeg or thrusters) Draught, max ......................................6.11m Propulsion ............2 x Wärtsilä 6L26 engines Max speed ............................................14kts Generators .........2 x LIAG/MAN, D2866 LXE Bollard pull, ahead ............................ 80tons Bollard pull, astern ............................. 75tons
Ship & Boat International November/December 2008 29
The vessels are specially designed
for escort purposes and is equipped each with two Voith propellers; Apex, Phenix and Tenax have Voith Schneider Propellers (VSP) 32 R5/250-2 and Velox has two VSP 32 R6/210-2. Apex and Phenix have two Volvo
Penta type D7AT/TA generators at 13kw power and Tenax and Velox have two Volvo Penta type TAMD74A generators at 136kW power. Electric power on all four vessels is provided by two Stamford generators
powered at 400V/220V-50Hz. In the escort role the vessels can
generate braking forces of 150tons at 10kts and steering forces of 140tons at the same speed. All of the tugs are equipped for fire-fighting to FiFi1 standards and pollution control operations. Solent Towage’s fleet also includes
the azimuth stern drive terminal tug, Thrax and tugboats Asterix and Ibex, all of which sail under the British flag. SBI
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